New York Times: Solar power is growing so fast in California — with installations by customers increasing tenfold since 2006 — that it is turning the state’s power system upside down. In a twist that is being closely watched by power companies around the country, California utilities will install massive banks of batteries and other devices to store the power surplus created by solar panels in the afternoon, when the sun’s rays are strong. The batteries are then to begin discharging power into California’s electric…

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